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Gewählte Master / Diploma Thesis:

Doris Weidenhiller (2011): Molekulare Evaluierung der Darmmikrobiota beim Huhn.
Master / Diploma Thesis - Institut für Lebensmittelwissenschaften, BOKU-Universität für Bodenkultur, pp 86. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The prophylactic use of antibiotics in animal nutrition to enhance productivity was banned in the European Union in january 2006. Plant extracts and essential oils are since widely used as alternatives. The work of this thesis is part of the project PhytoChick, which was designed as a feeding trial with 432 broiler chickens in the period from may to june 2009. In particular the birds were divided in three feeding groups. Each group was fed with a different amount of a phytogenic feed additive. After slaugther the chymus was collected and analysed. The purpose of this thesis was the molecular - biological analysation of the pathogenic microbiota in the chicken intestine and the evaluation of possible effects of the phytogenic feed additive on the prevalence of pathogenic bacteria. In six colon samples Clostridium perfringens was detected but no connection between prevalence of C. perfringens and the way of feeding could be made. The screening for virulence factors for Avian Pathogenic Escherichia coli (APEC) showed positive results in samples of all parts of the Intestine but there is little knowledge of the exact pathogenic pathways of this pathogen. Furthermore there was no detectable link between the presence of virulence factors and the way of feeding. Clostridium perfringens and APEC, both often detectable in visually healthy birds can cause severe infections of the gut when the birds are predisposed to stress, for example induced by inappropriate husbandry practices.

Beurteilende(r): Kneifel Wolfgang
1.Mitwirkender: Domig Konrad

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